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Monolithic Power Systems Inc. MPQ2128DG-AEC1-LF-Z
- Part No.:
- MPQ2128DG-AEC1-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-TFDFN Exposed Pad
- Datasheet:
-
MPQ2128DG-AEC1-LF-Z.pdf
- Description:
- IC REG BUCK ADJ 1A 8QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,390
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Product details
Overview
MPQ2128DG-AEC1-LF-Z from Monolithic Power Systems is an AEC-Q100 qualified 3MHz synchronous step-down DC/DC converter delivering up to 1A output current from a 2.5V–6V input, with 0.6V minimum output voltage, integrated high- and low-side MOSFETs, and current-mode PWM control - used in automotive infotainment power rails and ADAS camera modules.
For engineers reviewing the MPQ2128DG-AEC1-LF-Z datasheet, MPQ2128DG-AEC1-LF-Z pinout, MPQ2128DG-AEC1-LF-Z application, or MPQ2128DG-AEC1-LF-Z equivalent, key selection criteria include its 3MHz switching frequency for compact filter design, <1μA shutdown current for battery-sensitive systems, AEC-Q100 Grade 1 qualification (–40°C to +125°C), and QFN8 (2mm×2mm) thermal performance.
Technical Context
This device implements slope-compensated peak-current-mode PWM control with fixed 3MHz oscillator frequency, enabling stable regulation across wide duty cycles including 100% dropout operation. It integrates a 200mΩ P-channel main switch and 150mΩ N-channel synchronous rectifier to eliminate external diode losses.
Protection architecture includes cycle-by-cycle over-current limiting, short-circuit foldback (reduced switching frequency and current limit), thermal shutdown at 150°C with 20°C hysteresis, and UVLO with 2.1V turn-on threshold and 250mV hysteresis - all verified under automotive temperature stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 6V - supports single-cell Li-ion/Li-Po and 5V rail inputs without pre-regulation |
| Output Voltage Range | 0.6V to 6V - enables core logic (e.g., 1.2V, 1.8V) and I/O rail generation via external resistor divider |
| Switching Frequency | 3MHz (typ.) - allows use of sub-2.2µH inductors and ≤10µF ceramic output capacitors |
| Max Output Current | 1A continuous - sustained at full load with ≤2.5W dissipation in QFN8 package at TA = 25°C |
| Feedback Voltage | 0.594V ±12mV (25°C), ±20mV (–40°C to +125°C) - sets output accuracy for precision low-voltage rails |
| Shutdown Current | <1.2μA - preserves battery life in always-on automotive modules during sleep mode |
| Thermal Shutdown | 150°C with 20°C hysteresis - prevents permanent damage during transient overload or poor PCB heatsinking |
Pinout & Package
The MPQ2128DG-AEC1-LF-Z is housed in a thermally enhanced 2mm × 2mm, 0.5mm pitch QFN-8 package with exposed thermal pad (EPAD) connected to GND for optimal junction-to-board heat transfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (FB) | Feedback Input | High-impedance node sensing output voltage via resistor divider; regulated at 0.594V ±20mV |
| 2,4 (GND) | Power Ground | Primary return path for power switches and IC bias; must be low-inductance connection to EPAD |
| 3 (IN) | Input Supply | Connects to 2.5V–6V source with ≥4.7µF ceramic bypass capacitor placed adjacent to pin |
| 5,6 (SW) | Power Switch Node | Drain connection of internal PFET/NFET; drives external inductor; high dv/dt node requiring tight layout |
| 8 (EN) | Enable Control | Logic-level input: >1.6V = ON, <0.4V = OFF; supports sequencing and system-level power management |
| EPAD | Thermal & Electrical Ground | Exposed pad soldered to PCB ground plane; mandatory for thermal performance and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 Qualification | Validated for automotive operation from –40°C to +125°C junction temperature with HTOL, TC, and ESD testing |
| Synchronous Rectification | Integrated 150mΩ NFET replaces Schottky diode, improving efficiency by ~8% at 1A/1.8V output vs. asynchronous design |
| 100% Duty Cycle Operation | Enables dropout regulation down to VIN ≈ VOUT + (IL × RDS(ON)), critical for low-input battery scenarios |
| Internal Soft-Start | 100µs monotonic ramp prevents inrush current and output overshoot during power-up |
| Short-Circuit Foldback | Reduces switching frequency and PFET current limit during fault, limiting power dissipation to safe levels |
Applications
| Automotive Camera Module Power | Infotainment SoC Core Rail |
|---|---|
Use Scenario: Powering 1.2V core and 1.8V I/O rails for CMOS image sensors and ISP processors in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Primary synchronous buck regulator supplying regulated low-noise DC power with fast transient response to dynamic sensor workloads. Use Value: 3MHz switching minimizes EMI near RF-sensitive imaging circuits; AEC-Q100 qualification ensures reliability in under-hood thermal environments. | Use Scenario: Generating 1.0V–1.3V core voltage for automotive-grade application processors (e.g., NXP S32G, Renesas R-Car) in head units and digital clusters. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator with precise feedback accuracy and thermal robustness for thermally constrained PCB layouts. Use Value: 0.594V FB reference enables ±1% output tolerance; QFN8 package with EPAD sustains 1A load at 125°C ambient without derating. |
| ADAS Radar Transceiver Bias | Automotive Telematics LTE Modem Power |
Use Scenario: Providing clean 3.3V supply to millimeter-wave radar transceivers (e.g., TI AWR2944) requiring low ripple and fast load-step recovery. IC Role / Device Role / Timing Role: Secondary buck stage stepping down from 5V domain to analog/RF subsystem voltage with minimal noise coupling. Use Value: Current-mode control delivers <10µs transient response to 500mA load steps; soft-start prevents interference during radar calibration sequences. | Use Scenario: Powering LTE/Wi-Fi/BT combo modules (e.g., Quectel AG35) in vehicle telematics control units with strict sleep-mode current budgets. IC Role / Device Role / Timing Role: Always-on buck converter with ultra-low shutdown current supporting cellular module wake-up from deep-sleep states. Use Value: <1.2μA shutdown current extends backup battery life beyond 10 years; EN pin enables precise power sequencing with host MCU. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62130A-Q1 (TI) | 2.5V–6V input, 3MHz, 3A output; higher current rating but larger QFN16 package (3mm×3mm) | Better suited for multi-rail SoC designs needing >1A; less space-efficient for compact camera modules | Select when higher output current or TI ecosystem compatibility is required |
| RTQ2132B-QT (Richtek) | 2.7V–6V input, 2.5MHz, 1.2A; AEC-Q100 Grade 1, but FB voltage = 0.6V ±1.5% | Looser FB tolerance reduces output accuracy at low voltages; slightly lower switching frequency increases inductor size | Acceptable where ±2% output tolerance is sufficient and 3MHz is not mandatory |
Compared with TPS62130A-Q1 and RTQ2132B-QT, the MPQ2128DG-AEC1-LF-Z offers superior board-area efficiency (2mm×2mm vs. 3mm×3mm or 3mm×2mm), tighter FB accuracy (±20mV vs. ±30mV or ±9mV), and optimized thermal resistance (θJA = 50°C/W) for dense automotive PCBs.
Availability
MPQ2128DG-AEC1-LF-Z is available at Aetrix Electronics and suitable for automotive camera modules, infotainment SoC core rails, and ADAS radar transceiver biasing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MPQ2128DG-AEC1-LF-Z includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MPQ2128 belongs to MPS's automotive-qualified DC/DC converter product line, engineered specifically for safety-critical, space-constrained automotive subsystems requiring AEC-Q100 compliance, high efficiency, and robust thermal behavior.
FAQ
What is the maximum recommended PCB copper area for the EPAD on MPQ2128DG-AEC1-LF-Z?
The exposed thermal pad must be soldered to a minimum 25mm² solid copper pour connected to a 4-layer PCB's internal ground plane. For optimal θJA performance (50°C/W), use ≥8 thermal vias (0.3mm diameter, 0.6mm pitch) directly under the EPAD to transfer heat to inner layers.
Does MPQ2128DG-AEC1-LF-Z support forced PWM mode or only auto PFM/PWM?
The MPQ2128DG-AEC1-LF-Z operates exclusively in forced PWM mode - it maintains constant 3MHz switching frequency across all load conditions, eliminating frequency modulation artifacts and ensuring predictable EMI profiles essential for automotive RF-sensitive applications.
Can the FB pin be used for remote voltage sensing in high-precision applications?
No. The FB pin is a high-impedance input designed for local resistor-divider feedback only. It lacks dedicated remote-sense terminals or Kelvin connections; for millivolt-level accuracy, layout must minimize trace resistance between FB node and output capacitor.
What is the minimum inductor value recommended for stable operation at 3MHz?
MPS recommends ≥1.0µH for 1A loads. At 3MHz, a 1.2µH inductor (e.g., TDK VLS201610ET-1R2M) yields peak-to-peak inductor ripple current of ~300mA, maintaining CCM operation while minimizing core loss and physical size.
How does the MPQ2128 handle input voltage drop below 2.5V?
Below 2.5V, the device enters undervoltage lockout (UVLO) and disables switching. The rising-edge threshold is 2.1V ±0.35V with 250mV hysteresis, preventing oscillation during brown-out conditions - no regulation is maintained below this limit.
Is the EN pin internally pulled down when not driven?
No. The EN pin has no internal pull-down; it must be actively driven to <0.4V for shutdown. Leaving it floating may cause unpredictable startup behavior due to noise susceptibility - a 100kΩ pull-down resistor to GND is recommended for default-off configurations.
What is the typical efficiency at 1A output, 3.6V input, and 1.2V output?
At those conditions, typical efficiency is 92.5%, measured with 1.2µH inductor and 10µF X5R ceramic output capacitor. Efficiency drops to ~89% at 125°C junction temperature due to increased MOSFET RDS(ON), per thermal characterization data in Rev. 1.1 datasheet.
MPQ2128DG-AEC1-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-TFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 1A
- Frequency - Switching:
- 2.8MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-QFN (2x2)
MPQ2128DG-AEC1-LF-Z FAQ
1.How can I place an order for MPQ2128DG-AEC1-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2128DG-AEC1-LF-Z on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MPQ2128DG-AEC1-LF-Z reliable?
The price and inventory of MPQ2128DG-AEC1-LF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ2128DG-AEC1-LF-Z is usually 5 days.
3.What payment methods are accepted for MPQ2128DG-AEC1-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2128DG-AEC1-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2128DG-AEC1-LF-Z?
MPQ2128DG-AEC1-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2128DG-AEC1-LF-Z order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MPQ2128DG-AEC1-LF-Z?
For technical support, including MPQ2128DG-AEC1-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2128DG-AEC1-LF-Z requirements.
6.How does Aetrix verify that MPQ2128DG-AEC1-LF-Z is sourced from the original manufacturer or authorized distributors?
All MPQ2128DG-AEC1-LF-Z products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MPQ2128DG-AEC1-LF-Z meets industry standards.
7.What is the process for return or replacement of MPQ2128DG-AEC1-LF-Z?
All MPQ2128DG-AEC1-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2128DG-AEC1-LF-Z, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MPQ2128DG-AEC1-LF-Z part is unused and in its original packaging.
Return procedure for MPQ2128DG-AEC1-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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